To my very great surprise, I don’t much like the DSP function.
I really expected to use it and love it. Have been waiting for it. I have wanted room correction for some time but never got around to it. Now I could do it the server, for all my rooms and endpoints. Hooray!
But I don’t like it. Maybe when I get better at it. I’ll keep trying.
My preference is for clarity and precision, over most other attributes. (Not all, more on this later.) My gear is chosen accordingly.
So I experimented with room correction, Parametric and Procedural and Convolution, with different targets, house curves, etc. Used REW, and trial-and-error. The results measured much flatter, although not perfect. But it sounded variously thin, or muddy, or harsh, depending on how I defined the filters. Every time it was a relief to turn them off.
Was I just used to the old sound? Possible, but I gave it an honest try.
Is it just my incompetence? Quite possible. I have no experience with this. I well remember Malcolm Gladwell’s “10,000 hours to mastery”. And I didn’t have the best software tools (although REW is well regarded, Acourate may be better but costs nearly as much as Roon). But is the average user going to be more skilled than I am, or have better tools? I am going to get Acourate and try it, just because I’m a geek and I love a challenge. But so far…
For my headphones, I tried crossfeed. Muddy. Lost the all-important clarity. A relief to restore the original sound. Maybe if I had worse recordings…
Upsampling: DSD is not much value for the Meridian gear which runs on PCM internally, for crossovers and DSP. Upsampling the PCM didn’t do anything, Meridian is already good at it. Plus it interferes with MQA (so far). The Geek Pulse headphone amp accepts DSD128, but upsampling in Roon wasn’t better than letting the Geek do it, they are good at it; initially tempting, but eventually unsatisfactory.
Are all these special circumstances with my gear? Or incompetence? Or comfort with the old sound? Or my stubborn preference for clarity?
I don’t know. Will continue experimenting.
It would be interesting to hear others’ experiences.